Learning to pan is the key and keeping the target in the center of the frame, giving the AF the best chance to track the moving object. One of the techniques I use on a regular bases in panning is to using both eye’s , this give you best results for tacking and even when AF is lost you can still keep up with the subject. One aid that works for learn to track is to follow traffic along the highway, don’t worry about AF lock just work at tracking, first track the vehicle when you get better you can move onto license plates or even the people in the car.